Granite under wood for better isolation?

Tbg, the 1" granite is the shelf on my sandbox and is cut 1/2" smaller than the width and length of the inner sides of the sandbox. There is about 2 1/2 inches of sand under the granite. The ringing can be heard as smearing of detail in the lower midrange. I use the Stillpoints to decouple the table from the granite. It works quite well and also helps provide a very low noise floor. There is a slight softening of bass impact, but that is a trade-off I can live with. I wouldn't say that this will work for all components, but it has worked with my Gavia and stand. The granite is beautiful Dakota Mahogany so that is why it is still there. ;-)

I will probably chage out the Vibrapods down the road but I am shocked. It sounds great so far....

Dan_ed, the granite sounds pretty. I certainly would not argue with that. Have you tried the granite on top the component? Sony once made components with granite tops.

Haven't tried on top of anything, but I have realized the benefit of having weight on some things. Like my speed controller, of all things. :-)

One approach that Thom Makris keeps mentioning is to attach some angle to the bottom of the granite with JB Weld and let the angle embed into the sand. Perhaps more work at getting the vibs down into the sand will make the granite work without the Stillpoints. Something to try this spring.

Tzh: As noted above, some say the best solution is to join the granite and mdf together, for example with epoxy. Since you already have granite, and mdf is so inexpensive, it would be easy for you to try this.